Liquid crystal display device

Abstract

One of the pixel electrode and the counter electrode includes, on a protective film formed so as to cover the thin film transistor, a planar metal electrode formed so as to cover a rough surface formed in the reflective pixel part; and a planar transparent electrode formed in the reflective pixel part and the transparent pixel part so as to cover the metal electrode. Another one of the pixel electrode and the counter electrode includes, on an insulating film formed so as to cover the one of the pixel electrode and the counter electrode, a plurality of linear electrodes provided in parallel with one another so as to overlap the one of the pixel electrode and the counter electrode. The transparent electrode included in the one of the pixel electrode and the counter electrode is formed of a transparent conductive film which is formed through application.

What is claimed is: 
     
       1. A liquid crystal display device comprising:
 liquid crystal; 
 a substrate including a pixel region formed on a surface thereof on a liquid crystal side; 
 a thin film transistor, which is formed on the pixel region, and is turned on through supply of a scan signal from a gate signal line; 
 a pixel electrode, which is formed on the pixel region, and to which an image signal is supplied from a drain signal line via the thin film transistor when the thin film transistor is turned on; and 
 a counter electrode, which is formed on the pixel region so as to generate an electric field between the counter electrode and the pixel electrode; 
 wherein the pixel region includes a reflective pixel part and a transparent pixel part; 
 wherein one of the pixel electrode and the counter electrode includes, on a protective film formed so as to cover the thin film transistor:
 a planar metal electrode formed so as to cover irregularities formed in the reflective pixel part; and 
 a planar transparent electrode formed in the reflective pixel part and the transparent pixel part so as to cover the metal electrode; 
 
 wherein another one of the pixel electrode and the counter electrode includes, on an insulating film formed so as to cover the one of the pixel electrode and the counter electrode, a plurality of linear electrodes provided in parallel with one another so as to overlap the one of the pixel electrode and the counter electrode; 
 wherein the transparent electrode included in the one of the pixel electrode and the counter electrode is formed of a transparent conductive film which is formed through application; and 
 wherein the transparent conductive film is formed of a conductive polymer, which is applied in a form of ink and is baked. 
 
     
     
       2. A liquid crystal display device comprising:
 liquid crystal; 
 a substrate including a pixel region formed on a surface thereof on a liquid crystal side; 
 a thin film transistor, which is formed on the pixel region, and is turned on through supply of a scan signal from a gate signal line; 
 a pixel electrode, which is formed on the pixel region, and to which an image signal is supplied from a drain signal line via the thin film transistor when the thin film transistor is turned on; and 
 a counter electrode, which is formed on the pixel region so as to generate an electric field between the counter electrode and the pixel electrode, 
 wherein the pixel region includes a reflective pixel part and a transparent pixel part, 
 wherein one of the pixel electrode and the counter electrode includes, on a protective film formed so as to cover the thin film transistor:
 a planar metal electrode formed so as to cover irregularities formed in the reflective pixel part; and 
 a planar transparent electrode formed in the reflective pixel part and the transparent pixel part so as to cover the metal electrode, 
 
 wherein another one of the pixel electrode and the counter electrode includes, on an insulating film formed so as to cover the one of the pixel electrode and the counter electrode, a plurality of linear electrodes provided in parallel with one another so as to overlap the one of the pixel electrode and the counter electrode, 
 wherein the transparent electrode included in the one of the pixel electrode and the counter electrode is formed of a transparent conductive film which is formed through application; and 
 wherein the transparent conductive film is formed of corpuscles of an indium tin oxide and a conductive polymer, which are applied in a form of ink and are baked. 
 
     
     
       3. A liquid crystal display device comprising:
 liquid crystal; 
 a substrate including a pixel region formed on a surface thereof on a liquid crystal side; 
 a thin film transistor, which is formed on the pixel region, and is turned on through supply of a scan signal from a gate signal line; 
 a pixel electrode, which is formed on the pixel region, and to which an image signal is supplied from a drain signal line via the thin film transistor when the thin film transistor is turned on; and 
 a counter electrode, which is formed on the pixel region so as to generate an electric field between the counter electrode and the pixel electrode, 
 wherein the pixel region includes a reflective pixel part and a transparent pixel part, 
 wherein one of the pixel electrode and the counter electrode includes, on a protective film formed so as to cover the thin film transistor:
 a planar metal electrode formed so as to cover irregularities formed in the reflective pixel part; and 
 a planar transparent electrode formed in the reflective pixel part and the transparent pixel part so as to cover the metal electrode, 
 
 wherein another one of the pixel electrode and the counter electrode includes, on an insulating film formed so as to cover the one of the pixel electrode and the counter electrode, a plurality of linear electrodes provided in parallel with one another so as to overlap the one of the pixel electrode and the counter electrode, 
 wherein the transparent electrode included in the one of the pixel electrode and the counter electrode is formed of a transparent conductive film which is formed through application; and 
 wherein the transparent conductive film includes a plurality of layers, the plurality of layers including: 
 a film formed of corpuscles of an indium tin oxide, which are applied in a form of ink and are baked; and 
 a film formed of a conductive polymer, which is applied in a form of ink and is baked. 
 
     
     
       4. A liquid crystal display device according to  claim 3 , wherein the transparent conductive film has a film thickness of not more than 2 μm. 
     
     
       5. A liquid crystal display device according to  claim 1 , wherein the transparent conductive film has a film thickness of not more than 1 μm. 
     
     
       6. A liquid crystal display device according to  claim 2 , wherein the transparent conductive film has a film thickness of not more than 2 μm. 
     
     
       7. A liquid crystal display device comprising:
 liquid crystal; 
 a substrate; 
 a thin film transistor, which is formed on a surface of the substrate on a liquid crystal side, and is turned on through supply of a scan signal from a gate signal line; 
 a pixel electrode, which is formed on the surface of the substrate on the liquid crystal side, and to which an image signal is supplied from a drain signal line via the thin film transistor when the thin film transistor is turned on; and 
 a counter electrode, which is formed on the pixel region so as to generate an electric field between the counter electrode and the pixel electrode, 
 wherein one of the pixel electrode and the counter electrode includes a planar transparent electrode formed on a protective film formed so as to cover the thin film transistor, 
 wherein another one of the pixel electrode and the counter electrode includes, on an insulating film formed so as to cover the one of the pixel electrode and the counter electrode, a plurality of linear electrodes provided in parallel with one another so as to overlap the one of the pixel electrode and the counter electrode, 
 wherein the one of the pixel electrode and the counter electrode is formed of a transparent conductive film which is formed through application; and 
 wherein the transparent conductive film is formed of a conductive polymer, which is applied in a form of ink and is baked. 
 
     
     
       8. A liquid crystal display device comprising:
 liquid crystal; 
 a substrate; 
 a thin film transistor, which is formed on a surface of the substrate on a liquid crystal side, and is turned on through supply of a scan signal from a gate signal line; 
 a pixel electrode, which is formed on the surface of the substrate on the liquid crystal side, and to which an image signal is supplied from a drain signal line via the thin film transistor when the thin film transistor is turned on; and 
 a counter electrode, which is formed on the pixel region so as to generate an electric field between the counter electrode and the pixel electrode, 
 wherein one of the pixel electrode and the counter electrode includes a planar transparent electrode formed on a protective film formed so as to cover the thin film transistor, 
 wherein another one of the pixel electrode and the counter electrode includes, on an insulating film formed so as to cover the one of the pixel electrode and the counter electrode, a plurality of linear electrodes provided in parallel with one another so as to overlap the one of the pixel electrode and the counter electrode, 
 wherein the one of the pixel electrode and the counter electrode is formed of a transparent conductive film which is formed through application; and 
 wherein the transparent conductive film is formed of corpuscles of an indium tin oxide and a conductive polymer, which are applied in a form of ink and are baked. 
 
     
     
       9. A liquid crystal display device comprising:
 liquid crystal; 
 a substrate; 
 a thin film transistor, which is formed on a surface of the substrate on a liquid crystal side, and is turned on through supply of a scan signal from a gate signal line; 
 a pixel electrode, which is formed on the surface of the substrate on the liquid crystal side, and to which an image signal is supplied from a drain signal line via the thin film transistor when the thin film transistor is turned on; and 
 a counter electrode, which is formed on the pixel region so as to generate an electric field between the counter electrode and the pixel electrode, 
 wherein one of the pixel electrode and the counter electrode includes a planar transparent electrode formed on a protective film formed so as to cover the thin film transistor, 
 wherein another one of the pixel electrode and the counter electrode includes, on an insulating film formed so as to cover the one of the pixel electrode and the counter electrode, a plurality of linear electrodes provided in parallel with one another so as to overlap the one of the pixel electrode and the counter electrode, 
 wherein the one of the pixel electrode and the counter electrode is formed of a transparent conductive film which is formed through application; and 
 wherein the transparent conductive film includes a plurality of layers, the plurality of layers including: 
 a film formed of corpuscles of an indium tin oxide, which are applied in a form of ink and are baked; and 
 a film formed of a conductive polymer, which is applied in a form of ink and is baked. 
 
     
     
       10. A liquid crystal display device according to  claim 9 , wherein the transparent conductive film has a film thickness of not more than 2 μm. 
     
     
       11. A liquid crystal display device according to  claim 7 , wherein the transparent conductive film has a film thickness of 0.05 μm to 1 μm. 
     
     
       12. A liquid crystal display device according to  claim 8 , wherein the transparent conductive film has a film thickness of 0.05 μm to 2 μm.